Finding the Fourth Proportional to 42,955.57, 64,458.47 and 17,993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,955.57 : 64,458.47 = 17,993.50 : x
2. Step 2: Convert to fraction form
   42,955.57/64,458.47 = 17,993.50/x
3. Step 3: Cross multiply
   42,955.57x = 64,458.47 × 17,993.50
4. Step 4: Simplify right side
   42,955.57x = 1,159,833,228.83
5. Step 5: Solve for x
   x = 1,159,833,228.83/42,955.57
6. Step 6: Final answer
   x = 27,000.77